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gecko-dev/media/libyuv/docs/getting_started.md

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Getting Started

How to get and build the libyuv code.

Pre-requisites

You'll need to have depot tools installed: https://www.chromium.org/developers/how-tos/install-depot-tools Refer to chromium instructions for each platform for other prerequisites.

Getting the Code

Create a working directory, enter it, and run:

gclient config https://chromium.googlesource.com/libyuv/libyuv
gclient sync

Then you'll get a .gclient file like:

solutions = [
  { "name"        : "libyuv",
    "url"         : "https://chromium.googlesource.com/libyuv/libyuv",
    "deps_file"   : "DEPS",
    "managed"     : True,
    "custom_deps" : {
    },
    "safesync_url": "",
  },
];

For iOS add ;target_os=['ios']; to your OSX .gclient and run GYP_DEFINES="OS=ios" gclient sync.

Browse the Git reprository: https://chromium.googlesource.com/libyuv/libyuv/+/master

Android

For Android add ;target_os=['android']; to your Linux .gclient

solutions = [
  { "name"        : "libyuv",
    "url"         : "https://chromium.googlesource.com/libyuv/libyuv",
    "deps_file"   : "DEPS",
    "managed"     : True,
    "custom_deps" : {
    },
    "safesync_url": "",
  },
];
target_os = ["android", "unix"];

Then run:

export GYP_DEFINES="OS=android"
gclient sync

Caveat: Theres an error with Google Play services updates. If you get the error "Your version of the Google Play services library is not up to date", run the following: cd chromium/src ./build/android/play_services/update.py download cd ../..

For Windows the gclient sync must be done from an Administrator command prompt.

The sync will generate native build files for your environment using gyp (Windows: Visual Studio, OSX: XCode, Linux: make). This generation can also be forced manually: gclient runhooks

To get just the source (not buildable): git clone https://chromium.googlesource.com/libyuv/libyuv

Building the Library and Unittests

Windows

set GYP_DEFINES=target_arch=ia32
call python gyp_libyuv -fninja -G msvs_version=2013
ninja -j7 -C out\Release
ninja -j7 -C out\Debug

set GYP_DEFINES=target_arch=x64
call python gyp_libyuv -fninja -G msvs_version=2013
ninja -C out\Debug_x64
ninja -C out\Release_x64

Building with clangcl

set GYP_DEFINES=clang=1 target_arch=ia32 libyuv_enable_svn=1
set LLVM_REPO_URL=svn://svn.chromium.org/llvm-project
call python tools\clang\scripts\update.py
call python gyp_libyuv -fninja libyuv_test.gyp
ninja -C out\Debug
ninja -C out\Release

OSX

Clang 64 bit shown. Remove clang=1 for GCC and change x64 to ia32 for 32 bit.

GYP_DEFINES="clang=1 target_arch=x64" ./gyp_libyuv
ninja -j7 -C out/Debug
ninja -j7 -C out/Release

GYP_DEFINES="clang=1 target_arch=ia32" ./gyp_libyuv
ninja -j7 -C out/Debug
ninja -j7 -C out/Release

iOS

http://www.chromium.org/developers/how-tos/build-instructions-ios

Add to .gclient last line: target_os=['ios'];

armv7

GYP_DEFINES="OS=ios target_arch=armv7 target_subarch=arm32" GYP_CROSSCOMPILE=1 GYP_GENERATOR_FLAGS="output_dir=out_ios" ./gyp_libyuv
ninja -j7 -C out_ios/Debug-iphoneos libyuv_unittest
ninja -j7 -C out_ios/Release-iphoneos libyuv_unittest

arm64

GYP_DEFINES="OS=ios target_arch=arm64 target_subarch=arm64" GYP_CROSSCOMPILE=1 GYP_GENERATOR_FLAGS="output_dir=out_ios" ./gyp_libyuv
ninja -j7 -C out_ios/Debug-iphoneos libyuv_unittest
ninja -j7 -C out_ios/Release-iphoneos libyuv_unittest

both armv7 and arm64 (fat)

GYP_DEFINES="OS=ios target_arch=armv7 target_subarch=both" GYP_CROSSCOMPILE=1 GYP_GENERATOR_FLAGS="output_dir=out_ios" ./gyp_libyuv
ninja -j7 -C out_ios/Debug-iphoneos libyuv_unittest
ninja -j7 -C out_ios/Release-iphoneos libyuv_unittest

simulator

GYP_DEFINES="OS=ios target_arch=ia32 target_subarch=arm32" GYP_CROSSCOMPILE=1 GYP_GENERATOR_FLAGS="output_dir=out_sim" ./gyp_libyuv
ninja -j7 -C out_sim/Debug-iphonesimulator libyuv_unittest
ninja -j7 -C out_sim/Release-iphonesimulator libyuv_unittest

Android

https://code.google.com/p/chromium/wiki/AndroidBuildInstructions

Add to .gclient last line: target_os=['android'];

armv7

GYP_DEFINES="OS=android" GYP_CROSSCOMPILE=1 ./gyp_libyuv
ninja -j7 -C out/Debug libyuv_unittest_apk
ninja -j7 -C out/Release libyuv_unittest_apk

arm64

GYP_DEFINES="OS=android target_arch=arm64 target_subarch=arm64" GYP_CROSSCOMPILE=1 ./gyp_libyuv
ninja -j7 -C out/Debug libyuv_unittest_apk
ninja -j7 -C out/Release libyuv_unittest_apk

ia32

GYP_DEFINES="OS=android target_arch=ia32" GYP_CROSSCOMPILE=1 ./gyp_libyuv
ninja -j7 -C out/Debug libyuv_unittest_apk
ninja -j7 -C out/Release libyuv_unittest_apk

GYP_DEFINES="OS=android target_arch=ia32 android_full_debug=1" GYP_CROSSCOMPILE=1 ./gyp_libyuv
ninja -j7 -C out/Debug libyuv_unittest_apk

mipsel

GYP_DEFINES="OS=android target_arch=mipsel" GYP_CROSSCOMPILE=1 ./gyp_libyuv
ninja -j7 -C out/Debug libyuv_unittest_apk
ninja -j7 -C out/Release libyuv_unittest_apk

arm32 disassembly:

third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-objdump -d out/Release/obj/source/libyuv.row_neon.o

arm64 disassembly:

third_party/android_tools/ndk/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-objdump -d out/Release/obj/source/libyuv.row_neon64.o

Running tests:

util/android/test_runner.py gtest -s libyuv_unittest -t 7200 --verbose --release --gtest_filter=*

Running test as benchmark:

util/android/test_runner.py gtest -s libyuv_unittest -t 7200 --verbose --release --gtest_filter=* -a "--libyuv_width=1280 --libyuv_height=720 --libyuv_repeat=999 --libyuv_flags=-1"

Running test with C code:

util/android/test_runner.py gtest -s libyuv_unittest -t 7200 --verbose --release --gtest_filter=* -a "--libyuv_width=1280 --libyuv_height=720 --libyuv_repeat=999 --libyuv_flags=1 --libyuv_cpu_info=1"

Building with GN

gn gen out/Release "--args=is_debug=false target_cpu=\"x86\""
gn gen out/Debug "--args=is_debug=true target_cpu=\"x86\""
ninja -C out/Release
ninja -C out/Debug

Building Offical with GN

gn gen out/Official "--args=is_debug=false is_official_build=true is_chrome_branded=true"
ninja -C out/Official

Linux

GYP_DEFINES="target_arch=x64" ./gyp_libyuv
ninja -j7 -C out/Debug
ninja -j7 -C out/Release

GYP_DEFINES="target_arch=ia32" ./gyp_libyuv
ninja -j7 -C out/Debug
ninja -j7 -C out/Release

CentOS

On CentOS 32 bit the following work around allows a sync:

export GYP_DEFINES="host_arch=ia32"
gclient sync

Windows Shared Library

Modify libyuv.gyp from 'static_library' to 'shared_library', and add 'LIBYUV_BUILDING_SHARED_LIBRARY' to 'defines'.

gclient runhooks

After this command follow the building the library instructions above.

If you get a compile error for atlthunk.lib on Windows, read http://www.chromium.org/developers/how-tos/build-instructions-windows

Build targets

ninja -C out/Debug libyuv
ninja -C out/Debug libyuv_unittest
ninja -C out/Debug compare
ninja -C out/Debug convert
ninja -C out/Debug psnr
ninja -C out/Debug cpuid

Building the Library with make

Linux

make -j7 V=1 -f linux.mk
make -j7 V=1 -f linux.mk clean
make -j7 V=1 -f linux.mk CXX=clang++

Building the Library with cmake

Install cmake: http://www.cmake.org/

Default debug build:

mkdir out
cd out
cmake ..
cmake --build .

Release build/install

mkdir out
cd out
cmake -DCMAKE_INSTALL_PREFIX="/usr/lib" -DCMAKE_BUILD_TYPE="Release" ..
cmake --build . --config Release
sudo cmake --build . --target install --config Release

Windows 8 Phone

Pre-requisite:

  • Install Visual Studio 2012 and Arm to your environment.

Then:

call "c:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin\x86_arm\vcvarsx86_arm.bat"

or with Visual Studio 2013:

call "c:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\x86_arm\vcvarsx86_arm.bat"
nmake /f winarm.mk clean
nmake /f winarm.mk

Windows Shared Library

Modify libyuv.gyp from 'static_library' to 'shared_library', and add 'LIBYUV_BUILDING_SHARED_LIBRARY' to 'defines'. Then run this.

gclient runhooks

After this command follow the building the library instructions above.

If you get a compile error for atlthunk.lib on Windows, read http://www.chromium.org/developers/how-tos/build-instructions-windows

64 bit Windows

set GYP_DEFINES=target_arch=x64
gclient runhooks V=1

ARM Linux

export GYP_DEFINES="target_arch=arm"
export CROSSTOOL=`<path>`/arm-none-linux-gnueabi
export CXX=$CROSSTOOL-g++
export CC=$CROSSTOOL-gcc
export AR=$CROSSTOOL-ar
export AS=$CROSSTOOL-as
export RANLIB=$CROSSTOOL-ranlib
gclient runhooks

Running Unittests

Windows

out\Release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter="*"

OSX

out/Release/libyuv_unittest --gtest_filter="*"

Linux

out/Release/libyuv_unittest --gtest_filter="*"

Replace --gtest_filter="*" with specific unittest to run. May include wildcards. e.g.

out/Release/libyuv_unittest --gtest_filter=libyuvTest.I420ToARGB_Opt

CPU Emulator tools

Intel SDE (Software Development Emulator)

Pre-requisite: Install IntelSDE for Windows: http://software.intel.com/en-us/articles/intel-software-development-emulator

Then run:

c:\intelsde\sde -hsw -- out\release\libyuv_unittest.exe --gtest_filter=*

Memory tools

Running Dr Memory memcheck for Windows

Pre-requisite: Install Dr Memory for Windows and add it to your path: http://www.drmemory.org/docs/page_install_windows.html

set GYP_DEFINES=build_for_tool=drmemory target_arch=ia32
call python gyp_libyuv -fninja -G msvs_version=2013
ninja -C out\Debug
drmemory out\Debug\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter=*

Running UBSan

See Chromium instructions for sanitizers: https://www.chromium.org/developers/testing/undefinedbehaviorsanitizer

Sanitizers available: TSan, MSan, ASan, UBSan, LSan

GYP_DEFINES='ubsan=1' gclient runhooks
ninja -C out/Release

Running Valgrind memcheck

Memory errors and race conditions can be found by running tests under special memory tools. [Valgrind] 1 is an instrumentation framework for building dynamic analysis tools. Various tests and profilers are built upon it to find memory handling errors and memory leaks, for instance.

solutions = [
  { "name"        : "libyuv",
    "url"         : "https://chromium.googlesource.com/libyuv/libyuv",
    "deps_file"   : "DEPS",
    "managed"     : True,
    "custom_deps" : {
       "libyuv/chromium/src/third_party/valgrind": "https://chromium.googlesource.com/chromium/deps/valgrind/binaries",
    },
    "safesync_url": "",
  },
]

Then run:

GYP_DEFINES="clang=0 target_arch=x64 build_for_tool=memcheck" python gyp_libyuv
ninja -C out/Debug
valgrind out/Debug/libyuv_unittest

For more information, see http://www.chromium.org/developers/how-tos/using-valgrind

Running Thread Sanitizer (TSan)

GYP_DEFINES="clang=0 target_arch=x64 build_for_tool=tsan" python gyp_libyuv
ninja -C out/Debug
valgrind out/Debug/libyuv_unittest

For more info, see http://www.chromium.org/developers/how-tos/using-valgrind/threadsanitizer

Running Address Sanitizer (ASan)

GYP_DEFINES="clang=0 target_arch=x64 build_for_tool=asan" python gyp_libyuv
ninja -C out/Debug
valgrind out/Debug/libyuv_unittest

For more info, see http://dev.chromium.org/developers/testing/addresssanitizer

Benchmarking

The unittests can be used to benchmark.

Windows

set LIBYUV_WIDTH=1280
set LIBYUV_HEIGHT=720
set LIBYUV_REPEAT=999
set LIBYUV_FLAGS=-1
out\Release\libyuv_unittest.exe --gtest_filter=*I420ToARGB_Opt

Linux and Mac

LIBYUV_WIDTH=1280 LIBYUV_HEIGHT=720 LIBYUV_REPEAT=1000 out/Release/libyuv_unittest --gtest_filter=*I420ToARGB_Opt

libyuvTest.I420ToARGB_Opt (547 ms)

Indicates 0.547 ms/frame for 1280 x 720.

Making a change

gclient sync
git checkout -b mycl -t origin/master
git pull
<edit files>
git add -u
git commit -m "my change"
git cl lint
git cl try
git cl upload -r a-reviewer@chomium.org -s
<once approved..>
git cl land